Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor equation. Find your BMR, TDEE, and calorie targets for weight loss, maintenance, or gain.
This calculator is for informational purposes only and should not replace professional medical advice.
How It Works
This calculator uses the Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR), then multiplies it by an activity factor to determine your Total Daily Energy Expenditure (TDEE).
Activity multipliers:
- Sedentary: BMR × 1.2
- Lightly active: BMR × 1.375
- Moderately active: BMR × 1.55
- Active: BMR × 1.725
- Very active: BMR × 1.9
Frequently Asked Questions
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain vital functions like breathing, circulation, and cell production.
What is TDEE?
Total Daily Energy Expenditure (TDEE) is the total number of calories you burn per day including physical activity. It's calculated by multiplying your BMR by an activity factor.
What is the Mifflin-St Jeor equation?
The Mifflin-St Jeor equation is considered the most accurate formula for estimating BMR. For men: 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 5. For women: 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161.
Why subtract 500 calories for weight loss?
A deficit of 500 calories per day results in approximately 1 pound (0.45 kg) of weight loss per week, which is generally considered a safe and sustainable rate.